{"id":"F2006B04206","name":"AD/BEECH 90/12 - Ammeter Lead Circuit Protection","slug":"ad-beech-90-12-ammeter-lead-circuit-protection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43962,"registerId":"commonwealth-F2006B04206-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 90/12 - Ammeter Lead Circuit Protection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Beechcraft 90 and 65-90 (King Air) Series Aeroplanes\n\n \n\nAD/BEECH 90/12 Ammeter Lead Circuit Protection 11/67\n\nApplicability: All models.\n\n \n\nRequirement:  Install a suitable circuit protection device in each ammeter lead near the shunts. Compliance:              Forthwith.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1022},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope as a targeted safety intervention for a specific aircraft type's electrical system. There is no evidence of scope expansion beyond the original intent to mandate circuit protection for ammeter leads."},"complexity_factors":["Single imperative requirement with no exceptions or conditions","No defined terms section or cross-references to other legislation","Extremely short (one paragraph of substance)","Technical terminology ('ammeter', 'shunts') requires aviation electrical systems knowledge to interpret fully"],"plain_english_summary":"**What this is:** A mandatory safety directive (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority.\n\n**Who it affects:** Owners and operators of **Beechcraft 90 and 65-90 (King Air) series aircraft** — specifically all models of these twin-turboprop planes.\n\n**What it requires:** You must install a **circuit protection device** (like a fuse or circuit breaker) on each **ammeter lead** (the electrical wire that carries current measurements) near the **shunts** (devices that measure electrical current). This prevents electrical fires or damage if the wiring shorts or overloads.\n\n**When:** Immediately (the directive uses the term \"Forthwith,\" which means without delay).\n\n**Why it matters:** Unprotected ammeter wiring can overheat and cause in-flight electrical fires or instrument failure. This is a critical safety fix to prevent catastrophic failures in these specific aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-12-ammeter-lead-circuit-protection","history":"/api/acts/ad-beech-90-12-ammeter-lead-circuit-protection/history","analysis":"/api/acts/ad-beech-90-12-ammeter-lead-circuit-protection/analysis","conflicts":"/api/acts/ad-beech-90-12-ammeter-lead-circuit-protection/conflicts","importantCases":"/api/acts/ad-beech-90-12-ammeter-lead-circuit-protection/important-cases","documents":"/api/acts/ad-beech-90-12-ammeter-lead-circuit-protection/documents"}}